Segment Information (Operating Revenues And Income (Loss) From Continuing Operations) (Details) (USD $) In Thousands, unless otherwise specified	0 Months Ended	3 Months Ended								12 Months Ended
	Dec. 15, 2009	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Segment Reporting Information [Line Items]
Consolidated operating revenues		$ 19,820	$ 26,745	$ 25,284	$ 73,436	$ 37,100	$ 27,105	$ 22,035	$ 13,300	$ 145,285		$ 99,540		$ 138,257
(Loss) from continuing operations before equity in loss of unconsolidated affiliates and income taxes										(385,873)		(55,446)		(205,140)
Impairment losses	67,800	374,846		1,697	782	8,067		502	53	377,325		4,799		102,683
Pension charges										5,871		4,138		46,042
Residential Real Estate [Member]
Segment Reporting Information [Line Items]
Consolidated operating revenues										50,417		40,252		89,850
(Loss) from continuing operations before equity in loss of unconsolidated affiliates and income taxes										(385,367)	[1]	(47,370)	[1]	(137,855)	[1]
Impairment losses										361,000		4,800		94,800
Commercial Real Estate [Member]
Segment Reporting Information [Line Items]
Consolidated operating revenues										4,195		4,572		7,514
(Loss) from continuing operations before equity in loss of unconsolidated affiliates and income taxes										(20,220)	[2]	(1,394)	[2]	(513)	[2]
Rural Land Sales [Member]
Segment Reporting Information [Line Items]
Consolidated operating revenues										3,970		25,875		14,309
(Loss) from continuing operations before equity in loss of unconsolidated affiliates and income taxes										2,616		22,192		10,111
Forestry [Member]
Segment Reporting Information [Line Items]
Consolidated operating revenues										86,703		28,841		26,584
(Loss) from continuing operations before equity in loss of unconsolidated affiliates and income taxes										59,063		6,281		4,771
Other [Member]
Segment Reporting Information [Line Items]
(Loss) from continuing operations before equity in loss of unconsolidated affiliates and income taxes										(41,965)	[3]	(35,155)	[3]	(81,654)	[3]
Pension charges										$ 5,900		$ 4,100		$ 46,000

[1] Includes impairment losses of $361.0 million, $4.8 million and $94.8 million in 2011, 2010 and 2009, respectively.

[2] (b) Includes impairment losses of $16.3 million in 2011.

[3] (c) Includes pension charges of $5.9 million, $4.1 million and $46.0 million in 2011, 2010 and 2009, respectively.